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Nannochloropsis gaditana was grown in semicontinuous culture with a circadian light:dark cycle in a flat-panel photobioreactor. The microalga had a maximal protein content (3 pg cell−1) after 6 h light and then only storage compounds were accumulated that were consumed during the dark phase. Carbohydrates reached their maximum value after 8 h (0.8 pg cell−1) and lipids after 12 h light (2.5 pg cell...
Haematococcus pluvialis was cultured under N– and Mg+2-deficient conditions with two light intensities: 40 and 230 μmol m2 s−1. Highest astaxanthin concentration, 49.5 μg·ml−1, was obtained when high light was applied under N-deficient conditions. N-deficiency has a greater effect than high light intensity on astaxanthin synthesis by exerting a stronger blocking effect on cell division. The effect...
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